The Colour Strike was an industrial action by technicians at ITV companies which ran from 13 November 1970 to 8 February 1971. Due to a pay dispute, technicians refused to work with colour television equipment. Some shows made during this period aired in black-and-white as late as December 1971.
At that time, ITV had recently switched to colour transmissions, requiring the individual companies to invest heavily in new equipment. Early colour television studio cameras consisted of four tubes to relay the picture: three were receptive to colour (red, green and blue – the chrominance signal) with the fourth providing a high-resolution monochrome image (the luminance signal). The final colour picture was created by combining the chrominance and luminance signals, but the technicians simply switched off the colour tubes whilst this dispute took place. [1]
This meant that even though colour equipment was available, all shows were recorded and broadcast in black-and-white, [2] [3] thus denying the ITV companies the ability to sell airtime at the higher value that colour transmissions dictated.[ citation needed ]
In some film sequences for location shots in these programmes (shot in colour), the colour signal from the telecine machine had to be switched off in the vision mixing desk before being recorded to tape, but this was partly unsuccessful, leading to some film sequences being recorded with an odd array of pale colours (as for items where the colour is a mix of two primary colours, only one primary colour would show). This is prominent in the second series of Hadleigh , for example.[ citation needed ]
The first Coronation Street episode to be broadcast in colour was transmitted on 3 November 1969, but due to the strike, some 1970–71 episodes, including the one featuring Valerie Barlow's electrocution, were recorded in black-and-white. The last black-and-white edition was shown on 10 February 1971, although the episodes transmitted between 22 and 24 February 1971 contained black-and-white film inserts.[ citation needed ]
All of ITV's programmes were broadcast in black-and-white throughout this period, including scheduled repeats and regional programmes. During this time, ATV showed a modified version of its regular caption slide An ATV Colour Production at the end of its shows, which had the word 'colour' blanked out, with Granada's regular caption slide also omitting the words 'Colour Production' to reflect this fact too.[ citation needed ]
The strike was called off on 2 February 1971 with all colour production and transmissions resuming on 8 February.[ citation needed ]
Four ITV regions were still broadcasting exclusively in black-and-white prior to the start of the Colour Strike and would not commence colour broadcasts until the following dates: Westward Television (22 May 1971), Border Television (1 September 1971), Grampian Television (30 September 1971) and Channel Television (26 July 1976).[ citation needed ]
There was also a short dispute two years later in early 1973; this affected both BBC channels as well as ITV.[ citation needed ]
Analog television is the original television technology that uses analog signals to transmit video and audio. In an analog television broadcast, the brightness, colors and sound are represented by amplitude, phase and frequency of an analog signal.
NTSC is the first American standard for analog television, published and adopted in 1941. In 1961, it was assigned the designation System M. It is also known as EIA standard 170.
SECAM, also written SÉCAM, is an analog color television system that was used in France, Russia and some other countries or territories of Europe and Africa. It was one of three major analog color television standards, the others being PAL and NTSC. Like PAL, a SECAM picture is also made up of 625 interlaced lines and is displayed at a rate of 25 frames per second. However, due to the way SECAM processes color information, it is not compatible with the PAL video format standard. SECAM video is composite video; the luminance and chrominance are transmitted together as one signal.
Color television or colour television is a television transmission technology that includes color information for the picture, so the video image can be displayed in color on the television set. It improves on the monochrome or black-and-white television technology, which displays the image in shades of gray (grayscale). Television broadcasting stations and networks in most parts of the world upgraded from black-and-white to color transmission between the 1960s and the 1980s. The invention of color television standards was an important part of the history and technology of television.
The year 1970 in television involved some significant events. Below is a list of notable television-related events in that year.
Thames Television, commonly simplified to just Thames, was a franchise holder for a region of the British ITV television network serving London and surrounding areas from 30 July 1968 until the night of 31 December 1992. Thames Television broadcast from 09:25 Monday morning to 17:15 Friday afternoon at which time it would hand over to London Weekend Television (LWT).
ITV Yorkshire, previously known as Yorkshire Television and commonly referred to as just YTV, is the British television service provided by ITV Broadcasting Limited for the Yorkshire franchise area on the ITV network. Until 1974, this was primarily the historic county of Yorkshire and parts of neighbouring counties served by the Emley Moor transmitter. Following a reorganisation in 1974 the transmission area was extended to include Lincolnshire, northwestern Norfolk and parts of Derbyshire and Nottinghamshire, served by the Belmont transmitter.
A subcarrier is a sideband of a radio frequency carrier wave, which is modulated to send additional information. Examples include the provision of colour in a black and white television system or the provision of stereo in a monophonic radio broadcast. There is no physical difference between a carrier and a subcarrier; the "sub" implies that it has been derived from a carrier, which has been amplitude modulated by a steady signal and has a constant frequency relation to it.
Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades. Like other test cards, it was usually shown while no programmes were being broadcast. It was the first to be transmitted in colour in the UK and the first to feature a person, and has become an iconic British image regularly subject to parody.
Comedy Playhouse is a long-running British anthology series of one-off unrelated sitcoms that aired for 128 episodes from 1961 to 1975. Many episodes later graduated to their own series, including Steptoe and Son, Meet the Wife, Till Death Us Do Part, All Gas and Gaiters, Up Pompeii!, Not in Front of the Children, Me Mammy, That's Your Funeral, The Liver Birds, Are You Being Served? and particularly Last of the Summer Wine, which is the world's longest running sitcom, having run from January 1973 to August 2010. In all, 27 sitcoms started from a pilot in the Comedy Playhouse strand.
Dot crawl is a visual defect of color analog video standards when signals are transmitted as composite video, as in terrestrial broadcast television. It consists of moving checkerboard patterns which appear along horizontal color transitions. It results from intermodulation or crosstalk between chrominance and luminance components of the signal, which are imperfectly multiplexed in the frequency domain.
C-Day is the name of two television-related events: 1 March 1975, when Australia moved to regular colour television, and 1 July 2000, the day the UK television industry began accepting only widescreen commercials, an important step in the general move of broadcasting in the UK to the picture format.
Multiplexed Analogue Components (MAC) was an analog television standard where luminance and chrominance components were transmitted separately. This was an evolution from older color TV systems where there was interference between chrominance and luminance.
The Benny Hill Show is a British comedy television show starring Benny Hill that aired on the BBC and ITV between 15 January 1955 and 1 May 1989. The show consisted mainly of sketches typified by slapstick, mime, parody, and double entendre.
Broadcast-safe video is a term used in the broadcast industry to define video and audio compliant with the technical or regulatory broadcast requirements of the target area or region the feed might be broadcasting to. In the United States, the Federal Communications Commission (FCC) is the regulatory authority; in most of Europe, standards are set by the European Broadcasting Union (EBU).
This is a list of British television related events from 1970.
This is a list of British television related events from 1969.
Colour recovery is a process that restores lost colour to television programmes that were originally recorded on colour videotape but for which only black-and-white copies exist. This is not the same as colourisation, a process by which colour is artificially added to source material that was always black-and-white, or used to enhance poor-quality original sources. Colour recovery is a newer process and is fundamentally different from colourisation. Most of the work has been performed on PAL programmes, but the concept is not fundamentally restricted to that system.
Chroma dots are visual artifacts caused by displaying an unfiltered PAL analogue colour video signal on a black-and-white television or monitor. They are commonly found on black-and-white recordings of television programmes originally made in colour. Chroma dots were once regarded as undesirable picture noise, but recent advances in computer technology have allowed them to be used to reconstruct the original colour signal from black-and-white recordings, providing a means to re-colour material where the original colour copy is lost.
This is a timeline of the history of the British broadcaster Thames Television and its predecessor Associated-Rediffusion. Between them, they provided the ITV weekday service for London from 1955 to 1992, after which Thames continued as an independent production company until 2003.